1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6eba3ce56d1780099dcd885a25799ea67a4968c740b0edf7b21972a041dd58. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e87a33ad-bf1b-48a9-a831-e2b13f3a5f08.json and https://artists.proofprofile.net/proofs/artist/e87a33ad-bf1b-48a9-a831-e2b13f3a5f08.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf9972a8e8d35ec63f07b91ac28b13fac00e554b0cd2dcea59e7dbbdb84cc7b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:35:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdc9fb5c39f2b23d1af4295ddb8537923d694ce09bff924b742fda30cb42f069. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683507eab4aec3da3265d1f96ef4d1155a434cfbc945fb9a9a1c76c789773b9c. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f0f01e2c0256fa7b492084f14743f84957b41223a82e3935858dda7e630bcc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd784b1450d7e1098770f5601ddcbf40300736de4990cd963b1680f4be99bd5a. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33496ea577a7a0ae3f2fc4e17e6b83c6a4279045b7e3ad4ed31170a6f13f8491. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e11775f8d8edcfd5c1c8e7e16686220002ceeb2ff108a61b41e66e6b9bc2fd. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6018dc307d019e221e11932299172332220fb69d4584536b3b203323e8874c. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a5bf313849263003dfd6f635b5328e58d738cf76db3ee3d1080bf30997262d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x538b3ff35898831ae87ec1c9efe363fb5e541e5b0af9b860b1eb79363395dae6. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:55:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWS2555896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2567012bfc8c877d6447476ed1ac2b70daf5ba02ec2c285da517aba1c330f854. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5344859757fb52df4f43245a715ff3bb4d66f394c646936f2f09618beeb411. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917bdf80a290d56441b4330483f445d8b61dd05a2914e41a3ccb70a806efd867. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:06:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5627d6552ea3b2e89e6d0d6ad57d304e4bcf6dd74d004c41492b0daf3021170. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb38f71f34f9f9b0c53e0afb8bf8f70c0b2e1e3e7e6a74715b8ecf16d5e900aa0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:23:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43eb93cf9d79f61572cbc374e166bb02df15514ce235aa2c2c2456e0964169af. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f1ad71d4d20e2eb79bb4b7c8b730b567390a7fa4e2dc25cc299c9126e50d1f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:34:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWT2569993.